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Macroeconomics Notes For February 8th, 10th, 12th, with Professor Kaplan

by: Robin Silk

Macroeconomics Notes For February 8th, 10th, 12th, with Professor Kaplan Econ 2020

Marketplace > University of Colorado at Boulder > Economcs > Econ 2020 > Macroeconomics Notes For February 8th 10th 12th with Professor Kaplan
Robin Silk

GPA 3.871

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About this Document

Topics include long run economic growth, supply side growth, the production function, savings, and investments.
Principles of Macroeconomics
Jay Kaplan
Class Notes
Kaplan, CU, Boulder, Professor Kaplan, Macro, Economics, Macroeconomics, investment, Investments, savings, long run economic growth, supply side growth
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This 6 page Class Notes was uploaded by Robin Silk on Friday February 12, 2016. The Class Notes belongs to Econ 2020 at University of Colorado at Boulder taught by Jay Kaplan in Spring 2016. Since its upload, it has received 207 views. For similar materials see Principles of Macroeconomics in Economcs at University of Colorado at Boulder.


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Date Created: 02/12/16
Macroeconomics with Professor Kaplan ­  February 8th 2016     1. Median Household Incomes  a. MHIs have been going down over time.  b. 2000: $55,987  c. 2010: $51,893  d. 2014: $52,250  i. In order to succeed in life and be rich, you should invest some of your  income in stocks.  1. Stock gains can only be taxed a maximum of 20%  2. When dividends are paid they can only be taxed 20%  ii. 90% of stock shares are owned by the wealthiest 10%    2. Long Run Economic Growth  a. Supply Side: Looking at the long run  i. The supply side deals with the potential output  ii. The supply side deals with the capacity to produce goods and services  b. We use the PPF to show the production possibilities for an economy. There are  two ways to expand the PPF  i. Increase the labor input.  ii. Increase worker productivity  1. Through better technology  2. Through more capital per worker (Capital Labor Ratio, K/L)    3. Model of Long Run Growth (Post WWII Examples)  a. Germany & Japan: WWII impoverished citizens, reduced the population,  destroyed capital.   b. US: Economy grew thanks to WWII; came out as an economic powerhouse.  c. Germany and Japan grew really quickly economically; caught up with the US and  now they all grow at similar rates.  d. China started to show this after Mao was kicked out in the 80s; in recent years its  growth has started to slow and now it is on par to be equal with the US.  e. 4. Equations  a. Change in Labor / Labor = Labor Force Growth  b. Change in Capital / Capital = Capital Stock  c. Change in Technology / Technology = Technological Advancement  i. These are used to understand how an economy might grow/wane  ii. The sum of these three equations shows the change in a nation’s income  over its income    5. The Production Function  a. Q = f(K,L)  i. Q is the output; it is a function of an economy’s capital and labor.  b. The Aggregate Production Function  i. Worker Productivity depends on:  1. The amount of capital available per worker (K/L; capital labor ratio)  2. The human capital per worker (education, skills, etc)  3. The technology available  6. Observations  a. As the capital labor ratio increases, worker productivity increases, and ultimately  the GDP per worker increases too.  b. There are diminishing returns to additional capital per worker (falling gains)                  February 10th 2016    1. Current Event Discussion (Test Related)  a. Asteroid Mining  i. Luxembourg will finance up to 45% of research regarding this  ii. Planetary Resources are strange because no one knows who can claim  them, who they belong to, or who can harvest them  1. resources include water, and the platinum group metals  (extremely rare and expensive to harvest on earth)    2. Long Run Economic Growth  a. Potential Output  b. Capacity to Produce Goods & Resources  i. Supply side growth is dependant on two factors  1. Labor Force Growth  2. Worker Productivity        c. S=I   i. I is investment in capital  ii. S is savings, which has three components  1. Private. Individual savings, unspent paychecks  2. Public. Federal government  3. Net Foreign Savings. Capital account financial flow between  countries  4. Nation’s Savings = Private Savings + Public Savings + Net  Foreign Savings  5. Savings are necessary to invest; if you don’t have money saved  you can’t invest in things like capital which is done to:  a. 1:Replace depreciated capital   b. 2:Maintain K/L ratio; maintain productivity  c. 3:Upgrade of existing capital stock to better technology  d. 4:Equip new workers with their necessary capital (K/L  ratio)    iii. High Savings LDCs  iv. Low Savings LDCs    3. Supply Side Growth  a. Steady State; constant slow growth  i. Wealthy, developed countries  ii. These countries use savings and investments to further 1+2+3  b. High Savings Less Developed Country  i. Like a steady state, but more savings  ii. Savings and investments will cover 1+2+3+4. Increase K/L Ratio  c. Low Savings Less Developed Country    d.   i. Nations converge to a similar GDP growth rate due to diminishing returns  of capital  February 12th 2016    1. Recap: Supply Side Growth  a. Savings  i. Used to replace depreciated capital  ii. Upgrade capital to better technology  iii. Equip new workers with their share of equipment (Maintain K/L Ratio)  iv. Increase the capital / labor ratio (K/L)  b. Additional growth factors  i. Labor force growth  ii. Gains in worker productivity  c. Steady state countries (well developed nations, US, Germany, Japan, etc)  i. Do the first three under savings, but can’t increase the ratio  1. It is already too developed  ii. Usually still observe the additional growth factors  d. High Savings Less Developed Countries (LDCs)  1. Do all four under savings, as well as the fourth. It is important for  them to increase their K/Ls  2. Definitely see the additional growth factors and as such quick K/L  growth  e. Low Savings Less Developed Countries  i. Due to low savings, they are not able to invest in capital, equip new  workers, or increase the capital / labor ratio  ii. Labor force tends to grow, but there are no gains in worker productivity  iii. These factors result in a drop in the K/L ratio over time  1. Examples include Afghanistan, North Korea, Syria, Somalia    2. Savings Sources ­ Afghanistan Example (Low Savings LDC)  a. Private + Public + Net Foreign = Savings  i. Private Savings   1. Low income citizens  2. No good banking system  3. No stable income for citizens  a. All these things result in private savings not being viable  ii. Public Savings   1. No real natural resources to take advantage of  2. No citizen incomes to tax  iii. Net Foreign Investment  1. Very low outside savings  2. Outside help somewhat rejected (schools not always used, waste  of resources)      3. Direct foreign investment isn’t viable (factories etc)  a. Stable government needed  b. Strong legal system  c. Developed infrastructure   d. Communication systems  e. Labor force 


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